package servlet;

import java.io.IOException;
import java.io.PrintWriter;

import javax.jms.Session;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;

import run.*;

public class LoginServlet extends HttpServlet {
	private static final String CONTENT_TYPE="text/html;charset=GBK";
	 /* Constructor of the object.	 */

	public LoginServlet() {
		super();
	}

	/**
	 * Destruction of the servlet. <br>
	 */
	public void destroy() {
		super.destroy(); // Just puts "destroy" string in log
		// Put your code here
	}

	/**
	 * The doGet method of the servlet. <br>
	 *
	 * This method is called when a form has its tag value method equals to get.
	 * 
	 * @param request the request send by the client to the server
	 * @param response the response send by the server to the client
	 * @throws ServletException if an error occurred
	 * @throws IOException if an error occurred
	 */
	public void doGet(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {

		response.setContentType(CONTENT_TYPE);
		PrintWriter out = response.getWriter();
		out.println("<!DOCTYPE HTML PUBLIC \"-//W3C//DTD HTML 4.01 Transitional//EN\">");
		out.println("<HTML>");
		out.println("  <HEAD><TITLE>A Servlet</TITLE></HEAD>");
		out.println("  <BODY>");
		out.print("    This is ");
		out.print(this.getClass());
		out.println(", using the GET method");
		out.println("  </BODY>");
		out.println("</HTML>");
		out.flush();
		out.close();
	}

	/**
	 * The doPost method of the servlet. <br>
	 *
	 * This method is called when a form has its tag value method equals to post.
	 * 
	 * @param request the request send by the client to the server
	 * @param response the response send by the server to the client
	 * @throws ServletException if an error occurred
	 * @throws IOException if an error occurred
	 */
	public void doPost(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {

		response.setContentType(CONTENT_TYPE);
		PrintWriter out = response.getWriter();
		String username=request.getParameter("login");
		String password=request.getParameter("password");
		Login login=new Login();
		
//		out.println(username);
//		out.println(password);
		if(username.length()==0||password.length()==0){
			out.println("username or password should be filled"
					+"<a href=\"javascript:history.back()\">"+"please input again. </a>.");
			return;
		}
		boolean status=login.checkLogin(username, password);
		if(status){
			//HttpSession searchSession = request.getSession();
			//searchSession.setAttribute("UserInfo", login.GetUser());
			HttpSession session=request.getSession();
			session.setAttribute("UserInfo", login.GetUser());
			session.setAttribute("Username", username);
			response.sendRedirect("index.jsp");
		}
		else{
			out.println("You are not a valid user"
					+"<a href=\"index.jsp\">"+"<br>please input again. </a>.");
		}
		out.flush();
		out.close();
		return;
	}

	/**
	 * Initialization of the servlet. <br>
	 *
	 * @throws ServletException if an error occurs
	 */
	public void init() throws ServletException {
		// Put your code here
	}

}
